Huinawai Reservoir
Key Takeaway
Huinawai Reservoir is classified as high hazard in Hawaii. It was completed in 1902 and is 124 years old. Its primary use is irrigation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 48 ft (taller than 78.7% in HI) |
| Dam Length | 335 ft |
| Dam Type | Earth |
| Max Storage | 196 acre-ft |
| Normal Storage | 145 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 680 cfs |
| Year Completed | 1902 (124 years old) |
| NID ID | HI00104 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
BBCP Kukui'ula Development, LLC
Private
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High Hazard 17 ftFrequently Asked Questions
What is the hazard classification of Huinawai Reservoir?
Huinawai Reservoir is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Huinawai Reservoir?
Huinawai Reservoir is owned by BBCP Kukui'ula Development, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Huinawai Reservoir built?
Huinawai Reservoir was completed in 1902, making it 124 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Huinawai Reservoir?
Huinawai Reservoir serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Huinawai Reservoir?
Huinawai Reservoir has a dam height of 48 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Huinawai Reservoir last inspected?
Huinawai Reservoir was last inspected on October 11, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.